#!/usr/bin/env node

const Dog = require('./02-dog.js');

const taidi = new Dog('taidi',4),
      zangao = new Dog('zangao',6);

taidi.on('bark',onBark);
zangao.on('bark',onBark);


function onBark(){
  console.log(`name: ${this.name}, energy:${this.energy}`);
}

setTimeout(()=>{
  console.log('taidi eat food');
  taidi.energy=3;
},10000)
